Experimental study on recovering fine cassiterite from spontaneously combusted Dachang cassiterite-polymetallic sulphides

摘要

Fine polymetallic sulphides in Dachang mining areas are very difficult to be recovered. In order to solve this problem, a new flowsheet of jet centrifugal concentrator separation-flotation-tabling separation was adopted in this study, which means that jet centrifugal concentrator was firstly used to preconcentrate fine cassiterite, then flotation was introduced to remove sulfides in crude concentrate, and finally cassiterite concentrate was obtained after the flotation tailings were treated with tables. The results of closed-circuit experiment were achieved as concentration grade 44.50% and recovery 52.17% when the feeding grade was 0.30%. The results indicated the new flowsheet can fully take advantage of their characteristics and the fine cassiterite can be effectively recovered.